[stubs] Call interface descriptors cleanup.

src/code-stub-assembler.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/code-stub-assembler.h"
 #include "src/code-factory.h"
 #include "src/frames-inl.h"
 #include "src/frames.h"
 #include "src/ic/stub-cache.h"
 
@@ skipping 3027 matching lines @@
       Bind(&out_of_object_double);
       var_double_value.Bind(LoadHeapNumberValue(value));
       Goto(&rebox_double);
 
       Bind(&rebox_double);
       Return(AllocateHeapNumberWithValue(var_double_value.value()));
     }
 
     // |handler| is a heap object. Must be code, call it.
     Bind(&call_handler);
-    LoadWithVectorDescriptor descriptor(isolate());
-    TailCallStub(descriptor, handler, p->context, p->receiver, p->name, p->slot,
-                 p->vector);
+    typedef LoadWithVectorDescriptor Descriptor;
+    TailCallStub(Descriptor(isolate()), var_handler.value(), p->context,
+                 Arg(Descriptor::kReceiver, p->receiver),
+                 Arg(Descriptor::kName, p->name),
+                 Arg(Descriptor::kSlot, p->slot),
+                 Arg(Descriptor::kVector, p->vector));
   }
 
   Bind(&try_polymorphic);
   {
     // Check polymorphic case.
     Comment("LoadIC_try_polymorphic");
     GotoUnless(
         WordEqual(LoadMap(feedback), LoadRoot(Heap::kFixedArrayMapRootIndex)),
         &try_megamorphic);
     HandlePolymorphicCase(p, receiver_map, feedback, &if_handler, &var_handler,
@@ skipping 117 matching lines @@
     // For all objects but the receiver, check that the cache is empty.
     current_map.Bind(LoadMap(current_js_object.value()));
     Node* enum_length = EnumLength(current_map.value());
     Node* zero_constant = SmiConstant(Smi::FromInt(0));
     BranchIf(WordEqual(enum_length, zero_constant), &loop, use_runtime);
   }
 }
 
 }  // namespace internal
 }  // namespace v8